Equivalent & Substitute Parts for 1F4G-TP

Part Overview

The 1F4G-TP is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 1 A average rectified current, manufactured by Micro Commercial Co. This component features fast recovery characteristics with a reverse recovery time of 150 ns and is housed in an R-1 axial through-hole package. The 1F4G-TP is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Package / Case	R-1, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C

Substitute Part Grouping Explanation

Substitution of the 1F4G-TP is determined by electrical and mechanical parameter equivalence. The primary substitute identified is the 1F4 manufactured by SMC Diode Solutions. This substitution is valid based on the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V (identical)
Current - Average Rectified (Io): 1 A (identical)
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A (identical)
Reverse Recovery Time (trr): 150 ns (identical)
Current - Reverse Leakage @ Vr: 5 µA @ 400 V (identical)
Speed Classification: Fast Recovery ≤ 500 ns, > 200 mA (Io) (identical)

Mechanical Equivalence Criteria:

Package / Case: R-1, Axial (identical)
Mounting Type: Through Hole (identical)
Supplier Device Package: R-1 (identical)

The 1F4 substitute maintains full electrical and mechanical compatibility with the 1F4G-TP across all specified parameters.

Parameter Comparison

Parameter	1F4G-TP (Micro Commercial Co)	1F4 (SMC Diode Solutions)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	150 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V
Capacitance @ Vr, F	12 pF @ 4 V, 1 MHz	15 pF @ 4 V, 1 MHz
Package / Case	R-1, Axial	R-1, Axial
Mounting Type	Through Hole	Through Hole
Operating Temperature - Junction	-55°C ~ 150°C	-65°C ~ 150°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 1F4 manufactured by SMC Diode Solutions is a direct electrical and mechanical equivalent to the obsolete 1F4G-TP. Both components are ROHS3 compliant and carry MSL rating of 1 (Unlimited), indicating identical environmental handling requirements.

The 1F4 is currently in active production status, ensuring long-term availability and supply chain continuity. The substitute part maintains all critical electrical specifications including reverse voltage rating, forward current capacity, forward voltage drop, and reverse recovery time. The operating temperature range of the 1F4 extends to -65°C at the lower limit compared to -55°C for the 1F4G-TP, providing enhanced low-temperature performance capability.

The capacitance specification differs slightly (15 pF versus 12 pF at 4 V, 1 MHz), which remains within acceptable tolerance for general-purpose rectifier applications and does not restrict substitution.

Frequently Asked Questions (FAQ)

Q: Can the 1F4 directly replace the 1F4G-TP in existing designs?

A: Yes. The 1F4 is electrically and mechanically equivalent to the 1F4G-TP across all critical parameters including voltage rating, current capacity, forward voltage drop, reverse recovery time, and package configuration. Both components use the R-1 axial through-hole package and are suitable for identical circuit applications.

Q: What is the significance of the product status difference between the two parts?

A: The 1F4G-TP is classified as obsolete, indicating it is no longer manufactured by Micro Commercial Co. The 1F4 is in active production status, ensuring continued availability and supply chain support. For new designs or ongoing procurement, the 1F4 is the recommended selection.

Q: Are there compliance or certification differences between these parts?

A: Both the 1F4G-TP and 1F4 are ROHS3 compliant and carry identical MSL ratings of 1 (Unlimited). Both are classified under ECCN EAR99 and HTSUS 8541.10.0080. The 1F4G-TP carries REACH Unaffected status, while the 1F4 carries REACH Affected status. These compliance differences do not restrict substitution for general-purpose rectifier applications.

Q: How does the operating temperature range difference affect substitution?

A: The 1F4 operates from -65°C to 150°C, while the 1F4G-TP operates from -55°C to 150°C. The 1F4 provides an extended lower temperature operating range, making it suitable for applications requiring enhanced cold-temperature performance. This difference does not restrict substitution in applications within the 1F4G-TP temperature range.

Q: What is the significance of the capacitance difference?

A: The 1F4 has a capacitance of 15 pF at 4 V, 1 MHz, compared to 12 pF for the 1F4G-TP. This 3 pF difference is minor and does not affect substitution for general-purpose rectifier applications. Capacitance specifications are secondary parameters for rectifier diodes and do not impact primary electrical performance in standard circuit configurations.

Q: Are packaging and mounting considerations identical?

A: Yes. Both components use the R-1 axial package and through-hole mounting configuration. No modifications to PCB layout, footprint, or assembly procedures are required when substituting the 1F4 for the 1F4G-TP.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message